that enhances environment. indoor air quality, energy, water, materials and resources, and sustainable sites are the five categories for the lead. you can go for several gold or platinum certifications. >> the city wanted to be silver lead status. . maybe gold was a stretch. and people id, if we're going to be a sustainable organization that the pucs this has got to be the top of the line. it's got to be a lead platinum building. what does that mean to us? we run water, power, and sewer. so, those are some of the biggest things involved in lead platinum. ♪ ♪ >> by late 2008 the project, as we got the contractor on board and we were able to start pricing it, we're a multi-, multi-, multi-million dollar over budget. >> the story a lot of people don't know aftewe got select today do this project, the first price we came in with was $180 million. and the city said, you know, this is a great building, but we just don't want to spend that much money. so, the project was on the verge of being canceled. >> if you're looking at why this building came to be, in many ways it also included mayor gav